Gets or sets a string that specifies the target version and profile of the .NET Framework for the application domain, in a format that can be parsed by the FrameworkName.FrameworkName(String) constructor.

Changing the properties of an AppDomainSetup instance does not affect any existing AppDomain. It can affect only the creation of a new AppDomain, when the CreateDomain method is called with the AppDomainSetup instance as a parameter.